Other people with the name Duncan Campbell include a singer in the band UB40, the 2014 UK Turner prize winner, a deceased firebreathing Scottish preacher, and the former crime correspondent, News Editor, and Los Angeles correspondent of the Guardian. You may be looking for the latter, especially if your interest is serious/organised crime - please check his Guardian contributor page. If you wish to reach that other Duncan, then you have not found the right web page.

(This Duncan is NOT married to a famous actress, either. Sorry - you want the Serious Crime guy for that.)